The main goal of this workshop is to promote and initiate novel research on the security & privacy issues for applications that can be termed as lightweight security, due to the associated constraints on metrics such as available power, energy, computing ability, area, execution time, and memory requirements. As such applications are becoming ubiquitous, definitely providing an immense value to the society, they are also affecting a greater portion of the public & leading to a plethora of economical & security and privacy related concerns. The goal of this workshop is to create a platform where these concerns can be addressed and proposed solutions are discussed and evaluated. The solutions should be economically applicable in constrained environments such as wireless embedded systems. Due to the nature of the problem, good scalability properties are also expected requirements of the proposed systems. Providing implementation results & demonstrating the applicability of the proposed solutions are among the essentials. Metrics to evaluate different aspects of lightweight security solutions and combined metrics for overall evaluations thereof for a given application scenario are useful for implementers and engineers. Compactness and efficiency are the properties which are commonly sought.